The two photosystems of light reactions differ

slightly in their
a. carotenoids.
b. xanthophylls.
c. chlorophyll b.
d. chlorophyll a.
e. location in the stroma.


Answer: d

Biology & Microbiology

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The number of copies of a DNA sequence produced by the polymerase chain reaction depends on the

number of cycles of the reaction. Indicate whether the statement is true or false.

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The ciliary muscle

A. controls the shape of the lens to maintain a clear image of focus at various distances. B. is the part of the eye that contains rods, cones, and bipolar cells. C. is extremely sensitive to light and responsible for night vision. D. is the internal part of the cochlea with hair cells that are stimulated by sound waves. E. is the part of the inner ear that recognizes rotational equilibrium.

Biology & Microbiology

When a cell forms an amino acid by adding an amine group derived from ammonia to a precursor metabolite, this process is called

A. amination. B. transamination. C. reduction. D. polymerization. E. deamination.

Biology & Microbiology

The plasma membrane is said to be freely permeable because of the channel proteins.

a. true b. false

Biology & Microbiology